When we breathe in air there is dust and other particles in it.
As we dont drown in dust i would like to know how our body gets the dust out of out lunges.
Most of it is caught in our nose and turns into snot. The rest is collected into the mucus secretions in our throat and down into our lungs. Whenever you clear your throat or cough up a bit of mucus you are getting rid of that dust.
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